Effect of magnetostrictive phase on structural, dielectric and electrical properties of NiFe_2O_4 + Pb_(0.93)La_(0.07)(Zr_(0.60)Ti_(0.40))O_3 composites

摘要

Particulate composites of NiFe_2O_4 (NFO) and Pb_(0.93)La_(0.07) (Zr_(0.60)Ti_(0.40)) O_3 (PLZT) were synthesized by solid-state reaction technique. Structure and surface morphological studies were carried out using X-ray diffraction and scanning electron microscopy techniques, respectively. Frequency dependent variation of dielectric constant (s), loss tangent (tan 5) and ac resistivity for (x) NFO + (1 -x) PLZT composites in the range 100 Hz-5 MHz at room temperature were studied. The temperature dependence of dielectric constant (epsilon), loss tangent (tan 8) was studied in wide temperature range of measurement at fixed frequencies. Also DC resistivity measurements were carried out in the temperature range of 300 K-923 K. Structural, dielectric and electrical properties show notable change due to presence of magnetostrictive NFO phase along with PLZT.